Journal of Shanghai University(Natural Science Edition) ›› 2016, Vol. 22 ›› Issue (2): 239-244.doi: 10.3969/j.issn.1007-2861.2015.05.020

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Preparation and properties of Ni-doped SnO2 nanospheres for lithium-ion battery anode materials

MIAO Chunjie, HU Zhixiang, REN Lanlan, GAO Ziming, DONG Jingyu, LI Qi, LUO Zhigang, CHEN Zhiwen   

  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2016-01-15 Online:2016-04-30 Published:2016-04-30

Abstract:

Ni-doped SnO2 nanospheres were synthesized with a facile one-step hydrothermal method as a high-performance anode material for lithium-ion batteries. Scanning electron microscope (SEM), high resolution transmission electron microscope (HRTEM), Raman analyzer, X-ray diffraction (XRD) and electrochemical performance testing equipment such as blue electrical test systems and electrochemical workstation were used to investigate morphology, composition, crystallization behavior and electrochemical properties of Ni-doped SnO2 and find the best doping reaction time. It has been found that the appropriate Ni-doped SnO2 nanospheres showed much better rate capability and excellent cycling performance compared with the pristine SnO2. In particular, the sample of 5%  Ni-doped SnO2 whose reaction time was 12 h showed a high initial discharge capacity of 1 970.3 mA·h/g at a current density of 100 mA/g, far higher than the theoretical capacity of SnO2 of 782 mA·h/g. This was because Ni-doping could accommodate huge volume expansion and avoid agglomeration of nanoparticles. Thus, the electrochemical performance of Ni-doped SnO2 nanospheres was significantly improved.

Key words:  anode material,  lithium-ion battery , Ni-doped SnO